FIX: parsing of decimal numbers

Summary

Fix for https://gitlab.com/linkahead/linkahead-server/-/issues/239

Focus

The decimal_number token could eat whitespaces which lead to the use of atom rule where it should not happen.

Test Environment

pipeline and new unit test

Check List for the Author

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• All automated tests pass
• Reference related issues
• Up-to-date CHANGELOG.md (or not necessary)
• Up-to-date JSON schema (or not necessary)
• Appropriate user and developer documentation (or not necessary)
  • How do I use the software? Assume "stupid" users.
  • How do I develop or debug the software? Assume novice developers.
• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

For further good practices have a look at our review guidelines.

assigned to @henrik

marked the checklist item Reference related issues as completed

marked the checklist item Up-to-date CHANGELOG.md (or not necessary) as completed

marked the checklist item Up-to-date JSON schema (or not necessary) as completed

marked the checklist item Appropriate user and developer documentation (or not necessary) as completed

marked the checklist item Annotations in code (Gitlab comments) as completed

requested review from @timm

mentioned in issue #322 (closed)

marked the checklist item I understand the intent of this MR as completed

marked the checklist item All automated tests pass as completed

marked the checklist item Up-to-date CHANGELOG.md (or not necessary) as completed

marked the checklist item Appropriate user and developer documentation (or not necessary) as completed

marked the checklist item The test environment setup works and the intended behavior is reproducible in the test as completed

marked the checklist item Check: Are there specifications? Are they satisfied? as completed

marked the checklist item In-code documentation and comments are up-to-date. as completed

resolved all threads

mentioned in commit 3e8bd5f7

merged